文档介绍：中文摘要
沙溪口水电站计划建在福建省南平市上游的西溪上,是闽江流域的一个梯级电站,属于河床式水电站。本电站主要组成建筑物有溢流坝、非溢流坝、厂房和船闸。坝体型式为混凝土重力坝,溢流坝段布置于河床中部,厂房布置在河床右岸,船闸布置在左岸。
非溢流坝坝顶高程93m,上游面坡度为1:,下游面坡度1:,。溢流坝段全长340m,设有18孔溢流孔, m,沿主河槽宣泄绝大部分洪水。
,,,。,总装机容量为320MW,安装有4台轴流式水轮发电机组,每台装机容量为8MW。水轮机型号均为ZZ560-LH-850,,,,取安装场高程与发电机层同高。, m,,宽74m。220kV及110kV开关站布置在尾水平台右侧。
船闸闸室100m×20m×(长×宽×最小水深),位于溢流坝左侧。
沙溪口水电站具备发电,航运,过木等的综合效益,是福建电网的骨干电厂。
关键词
沙溪口水电站、河床式厂房、重力坝、溢流坝、水轮机、发电机、抗滑稳定性、扬压力、轴流式水轮机、发电机层结构设计
Abstract
Shaxikou Hydropower Station is prepared to built at Xixi stream, upstream the city of Nanping in Fujian Province. It is one of the cascade development in the Minjiang river basin. It is a powerhouse in river channel.
The main structures of Shaxikou Hydropower Station is consist of overflow spillway dam, non-overflow spillway dam, powerhouse and lock. The dams are concrete gravity dams. The overflow spillway dam lies in the centre of the riverbed. The powerhouse lies on the right, and the lock is located on the left.
The top of the non-spillway dam is at an elevation of 93 meters. The upstream of the dam is vertical, the lower slope degree is 1:,and the upper slope degree is 1:. the crest of the weir is at an elevation of meters. The overflow spillway dam is about 340 meters long in total, with 18 openings each of 17 meters wide, discharging most of the flood flow along the main river channel.
The normal water lever of the reservoir is meters,while the design flood water level of the reservoir reaches at meters. The checking flood water level is about 91 meters. And the dead water level is only meters.
The design cross-head is meters. The project has a total installed capacity of 320MW. It houses four axial-flow turbines coupled with generators 8MW each. The type of the turbine is ZZ560-LH-850. The diameter of the turbine is 8.